I like the word for the suspension rings: GUMMIS, makes me think of Gummi Bears sweets. Wealso have similar: gum tree, gum rubber, chewing gum, but somehow gummis just sounds better! I am still surprised that anyone would want to sell such a rare item publicly. If I had a Mopetta and a spare engine I would probably only sell it to someone with another Mopetta (or similar) which needs and engine